Boiler



Feb. 5, 1935. D, s JACOBUS 1,989,694

BOILER Filed June 12, 1930 2 Sheets-Sheet 1 m INVENTOR BY flTORNEY 5 q Feb. 5, 1935. s JACOBUS 1,989,694

BOILER Filed June 12, 1930 2 Sheets-Sheet 2 0o:0ooc O0oo\: 000000000000000000 l'l I 060?:00100000000000000000000000000 I 'l\ bohoifopooooooooooo00000000000000 fil MI 00 O O 0O 00 Q INVENTOR BY I M ATTORNEYS Patented Feb. 5, 1935 .7

HJT-KU'NITED .STATES PATENT? OFFICE BOILER David S. Jacob'us, Montclair, N. J assignor to The Babcock & Wilcox Company, Bayonne, N. J., a

corporation of New Jersey Application June 12,1930, Serial No. 460,589 I I, f

4 Claims. (01.122-265) This invention relates to a novel and improved type of boiler, the novel features of which will be best understood from the following description andthc annexed drawings, in which,

Fig. 1 is a vertical sectional view through a furnace and boiler, showing one form of the invention.

Fig. 2 is a View on the line 22 of Fig. 1.

Fig. 3 is a fragmentary section taken on the line 33 of Fig. 1, and showing one form of header.

Fig. 4 is a view similar to Fig. 3, but showing a different form of header.

I have shown the invention as employed in connection with a furnace having a combustion chamber 1, the walls of which are lined with water circulating tubes 2, which may be connected to the circulating system of the boiler if desired, these connections being omitted from the drawings. The fuel may be pulverized coal burned by a plurality of burners, one of which is indicated at 3. The combustion chamber is of a substantial height, as indicated, so as to provide ample space for combustion, and a substantial part of the heat is absorbed by the wall tubes 2.

The boiler is provided with a cross drum 4 connected by circulators 5 to uptake headers 6, and by nipples 7 to downtake headers 8. These headers 6 and 8 are disposed in rows, preferably with the axes of the headers in each row substantially in a single plane and these planes of the uptake and downtake headers respectively, are disposed at an angle to each other, as plainly shown in Fig. 1, so that the uptake and downtake headers respectively, form opposite sides of a gas pass through which the hot gases rising from the combustion chamber may flow to and through the outlet fiue 9.

The headers are connected by a plurality of curved tubes 10, these tubes preferably being uniformly curved throughout their length on arcs of concentric circles. The tubes 10' nearest the combustion chamber are spaced apart a greater distance vertically than those more remote from the combustion chamber, in order to minimize the deposition and bridging of slag from one tube to another.

As shown best in Fig. 2, the tubes connected to each header are arranged in a single row extending lengthwise of the header, the plane of this row preferably passing through the axis of the header. It will, of course, be evident that the same plane will pass through the axes of the headers at both ends of the row of tubes. so that a single plane will embrace a row of tubes and the two headers to which the tubes in that row are connected. The headers are each provided with handholes 11, best shown in Figs. v3 and 4.

Preferably, each tubehas a handhole disposed in such a position with respect thereto, that the tube may be withdrawn through that hole, this being made possible by the fact that the tubes are all uniformly curved on arcs of concentric circles. The handholes, of course, may be made 0 of suificient size so as to reach one or more tubes, but preferably only one tube. Of course, suitable closures 12 are provided for the handholes.

The headers are preferably formed of tubes which may initially be in the usual cylindrical 5 form, but are afterwards flattened, so that the adjoining sides 13 of two adjacent headers are flat. The sides in which the tubes are entered may be also flat, as indicated at 14 in Fig. 3, or may be left in the cylindrical form, as indicated at 1.5 in Fig. 4.

Supported above the bank of tubes 10 is a superheater 16 supplied with steam from the drum 4 through a connection 17. This superheater may conveniently be supported on the 25 top tubes of the bank, these tubes forming a transversely extending row. For that purpose, a wall 18 may be built on the top transverse row of tubes, to support one end of the superheater, as indicated, this wall being joined to the head- 30 ers 8 by means of a baflie 19. The tubes of the superheater may be supported at a point near their other end by a second wall 20 resting upon blocks 21 supported on the water tubes.

By the arrangement shown above, the hot gases impart a substantial portion of their heat to the wall tubes, and then pass upwardly between the curved tubes of the bank and over the superheater and circulators 5 out through the flue 9. Deposition of slag on the tubes is reduced to a 0 minimum, and a free flow of gases to and over the superheater is thus maintained. The tubes in the bank being arranged in longitudinal rows,

a certain amount of radiant heat from the furnace combustion chamber can pass to the super- 45 heater, thus increasing the amount of heat imparted thereto.

I claim:-

1. In a water tube boiler, two rows of headers disposed on opposite sides of a vertically ex- 50 tending gas pass and arranged at an angle to each other, the headers in each row being disposed close together, tubes connecting the headers in one row to those in the other and uniformly curved substantially throughout their length, the tubes connected to each header being arranged in a single row extending longitudinally of said header, said headers having handholes giving access to said tubes, and a combustion chamber disposed beneath said tubes, the tubes in each row nearest the chamber being spaced further apart than those farthest therefrom.

'2. In a water tube boiler, two rows of headers disposedontoppositesides of "a vertically ex tending gas pass and arranged at an angle to each other, the headers in each row being disposed close together, tubes connecting the head ers in one row to those in the other and uniformly curved substantially throughout their length, the tubes connected ifto eachiheaderbe tudinally of said header, said headers having handholes giving access totsaidttubes a.com: bustion chamber disposed beneath said 'tub'e's,

thetubes in each row nearest the'chamber' be-- ing spaced .further apart than those farthest therefrom, and'a 'superheater disposed above said tubes.

3. In a water tube boiler, two rows of'flat sided headers disposed -on opposite sides of a gas pass and arranged at an angle to each other, each header having opposite curved faces alternating with the fiat faces, the headers in each row being disposed close together with their flat sides in parallel relation, tubes connecting the headers in one row to those in the other and uniformly curved substantially throughout their length, the tubes connected to each headeribeingarrangewin a Sl'II'gIQiIOTW extending longitudinally"of said headerg-and said headers having handholes giving access to said tubes.

. 4. In a water tube boiler, two rows of curved sided headers disposed on opposite sides of a gas pass and arranged at an angle to each other, the headersrin :each :row being disposed close toing arranged in a single row exteri'ding 1orrgi= gether and-ithesadjdining sides of adjacent head- -'-ers being flat,-=tubes"connecting the curved sides tofutherheaders in, one row to those in the other and "uniformly curved substantially throughout theirilength, the tubes connected to each header being arranged in a singlerow extending longitudin'ally of said headeryand said headers having handholes giving access "to said tubes.

DAVID -S. JACOBUS. 

